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Bugs and pests Elder for killind aphids, caterpillars or mildew
This kills aphids, small caterpillars and is useful as a fungicide for mildew and blackspot on roses. The toxic agent is hydro-cyanic acid, so in preparing the spray use an old saucepan.
Gather 450g (1 lb) leaves and young stems of elder prefer-ably in spring when the sap is rising. Place in the saucepan and add 3.3 litres (6pt) water. Boil for half an hour, topping up as necessary. Strain through old tights and use the liquid cold and undiluted. It will keep for three months if bottled tightly while still hot.
Twigs of elder, cut in the spring and placed at intervals, inverted V-wise, over early turnip rows, are said to ward off attack by flea beetles.